Planar rotary screen combined support mechanism

Abstract

This utility model discloses a planar rotary screen combined support mechanism, including: a screen boat with its feed end higher than its discharge end; a main suspension base located below the screen boat and suspended from the upper frame by ropes; an eccentric rotating mechanism, with its lower end supported by the crossbeam of the main suspension base and its upper end supporting the feed end of the screen boat, the main pulley of its drive end being connected to a drive motor via a belt; a screen boat slider fixed below the two corners of the discharge end of the screen boat; a planar bearing with evenly distributed supporting steel balls in the ball grooves on the upper surface of the bearing seat, each supporting steel ball supporting the lower surface of the screen boat slider; the outer spherical surface of the bearing seat mates with the inner spherical surface of the bearing base, and the bearing sealing ring is embedded in the outer circumference of the bearing seat and abuts against the lower surface of the screen boat slider; and an elastic plate, with its upper end fixed to the transverse frame of the discharge end of the screen boat by an elastic plate pressure block, and its lower end fixed to the crossbeam of the discharge end of the main suspension base by an elastic plate pressure block. This mechanism has good stress distribution, low frictional resistance, high screening efficiency, and long service life.

Description

Technical Field

[0001] This utility model relates to a driving and rotating mechanism for a planar rotary screen, and more particularly to a combined support mechanism for a planar rotary screen, belonging to the technical field of screening equipment. Background Technology

[0002] Rotary grading screens are widely used in the screening and grading of raw materials and finished products in industries such as grain, food, and feed, especially for the screening and grading of granular materials. A rotary grading screen consists of a base, a boat base, a screen boat (including screen frames and partitions), a suspension device, a drive device, and a tail-end swing support mechanism. The boat base is suspended from the base by four suspension devices. The feed end of the screen boat is slightly higher and supported by the drive device, creating an inclination angle between the screen boat and the horizontal plane to facilitate material movement towards the tail. The discharge end of the screen boat is slightly lower and supported by the tail-end swing support mechanism on the boat base. A motor is mounted on the boat base, and power is transmitted to an eccentric rotating device via a belt. The eccentric rotating device drives the feed end of the screen boat to rotate. The trajectory of the screen boat from the feed end to the discharge end gradually changes from horizontal circular motion to elliptical motion, and finally to approximately reciprocating linear motion.

[0003] Material enters the screen vessel through the feed inlet. Under the action of the circular motion at the feed end of the screen vessel, it is rapidly and evenly distributed across the entire width of the screen surface, resulting in automatic grading. Smaller particles at the bottom of the material layer pass through the screen quickly, while larger particles at the top move downwards along the inclined surface of the screen vessel towards the discharge end. Near the discharge end, the movement of the screen vessel is an approximately reciprocating linear motion, which gradually weakens the screening effect, causing particles larger than the screen aperture size to move rapidly towards the outlet until they are discharged from the machine, completing the entire screening process.

[0004] The stern swing support mechanism of the screening vessel must have a certain strength to support the screening vessel, and also a certain degree of elasticity to allow the stern of the rotary grading screen to move within a certain range.

[0005] Traditional tail swing support mechanisms use engineering plastic sheets as support plates. The two ends of the support plates are fixedly connected to the screen boat and the boat seat. The support plates adapt to the movement of the tail of the screen boat through their own physical properties. With this structure, the stress condition of the support plates is not good. In particular, since the two ends are fixedly connected, they are easy to break and be damaged during operation due to the weight of the screen boat and the long-term alternating stress.

[0006] The utility model patent with publication number CN 201271631Y discloses a screening device in which the tail end of the screening boat is suspended by two sets of suspension rods. The suspension rods bear both the weight of the screening boat and the impact force of the swinging of the screening boat, and the lubrication is very poor.

[0007] To address the aforementioned shortcomings, most manufacturers on the market use planar bearings and crank-connecting rods to force the rear end to perform linear motion. The bearings and crank-connecting rods are lubricated with grease, but the grease is quickly pushed away from the lubrication surface by friction. This results in poor lubrication and significant pollution from grease dripping onto the ground. On-site, oil basins are often placed at the tail end of the grading screen to collect the grease, which not only produces a poor visual appearance but also fails to meet clean production requirements. Utility Model Content

[0008] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0009] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0010] The purpose of this utility model is to overcome the problems existing in the prior art and provide a planar rotary screen combined support mechanism that gradually transforms the circular feeding trajectory into a straight forward and backward trajectory, resulting in good force distribution, low frictional resistance, high screening efficiency, and long service life.

[0011] To solve the above technical problems, this utility model provides a planar rotary screen combined support mechanism, comprising:

[0012] The screening boat has its feed end higher than its discharge end;

[0013] The main base is suspended below the screening vessel and its four corners are suspended from the upper frame by ropes.

[0014] The eccentric rotating mechanism is supported at the lower end by the crossbeam of the main suspension base and at the upper end by the feed end of the screen boat. Its drive end is equipped with a main pulley, which is connected to the drive motor through a belt.

[0015] The sliders of the screen boat are fixed at the lower corners of the two discharge ends of the screen boat.

[0016] The planar bearing includes a bearing housing, supporting steel balls, a bearing seal ring, and a bearing base. Supporting steel balls are evenly distributed in the ball grooves on the upper end face of the bearing housing, and each supporting steel ball is supported on the lower end face of the screen boat slider. The outer spherical surface of the bearing housing mates with the inner spherical surface of the bearing base, and the bearing seal ring is embedded in the outer circumference of the bearing housing and abuts against the lower end face of the screen boat slider.

[0017] The upper end of the elastic plate is fixed to the transverse frame at the discharge end of the screen vessel by an elastic plate pressure block, and the lower end is fixed to the crossbeam at the discharge end of the main base by an elastic plate pressure block.

[0018] As an improvement of this utility model, the upper bearing seat is provided with a conical oil groove at its center, and the lower end of the conical oil groove communicates with the oil cavity of the bearing base through a central small hole.

[0019] As a further improvement of this utility model, the lowest point of the lower circumferential wall of the bearing base is provided with a radially penetrating oil outlet hole. The inner port of the oil outlet hole is connected to the oil cavity of the bearing base, and the outer port of the oil outlet hole is provided with an oil outlet connector. The lowest point of the upper circumferential wall of the bearing upper seat is provided with an oil inlet hole. The inner port of the oil inlet hole is connected to the ball groove and conical oil groove of the bearing upper seat, and the outer port of the oil inlet hole is provided with an oil inlet connector. The oil inlet connector is connected to the oil outlet of the automatic oil filling and return system, and the oil outlet connector is connected to the oil inlet of the automatic oil filling and return system.

[0020] Compared with the prior art, the advantages or beneficial effects of the embodiments of this application include at least the following: 1. By adopting the principle of force separation, the linear impact force and rotational force on the plane are borne by the elastic plate, and the force in the direction of gravity is borne by the plane bearing, which disperses the force, makes the service life longer, the friction smoother, and makes the equipment operation more stable and reliable; the feeding circular trajectory is gradually converted into the forward and backward linear trajectory, which facilitates screening and feeding, and can truly realize the separation state of the material close to that of manual separation, improve screening efficiency, and increase the output by more than 20% for the same screening area;

[0021] 2. The continuous automatic oiling and return circulation system ensures that there is always an oil film on the pressure surface, making the operation easy and reducing energy consumption. The large sealing ring ensures that the screen boat slider does not leak oil throughout the entire amplitude range, providing good lubrication and keeping the site environment clean. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0023] Figure 1 This is the front view of the planar rotary screen assembly support mechanism of this utility model;

[0024] Figure 2 The three-dimensional support mechanism for the planar rotary screen of this utility model Figure 1 ;

[0025] Figure 3 The three-dimensional support mechanism for the planar rotary screen of this utility model Figure 2 ;

[0026] Figure 4 for Figure 2 A close-up view of the mid-tail section;

[0027] Figure 5 This is a top view of the planar bearing in this utility model;

[0028] Figure 6 This is an enlarged cross-sectional view of the screening vessel of this utility model;

[0029] In the diagram: 1. Screen boat; 1a. Feed inlet; 1b. Discharge outlet; 1c. Screen boat slider;

[0030] 2. Suspend the main base; 3. Suspension ropes;

[0031] 4. Drive motor; 5. Belt; 6. Eccentric rotating mechanism; 6a. Main pulley;

[0032] 7. Surface bearing; 7a. Bearing housing; 7a1. Conical oil groove; 7b. Supporting steel ball; 7c. Bearing seal ring; 7d. Bearing base; 7e. Oil inlet connector; 7f. Oil outlet connector;

[0033] 8. Elastic plate; 9. Elastic plate pressure block;

[0034] 10. Automatic refueling and return system. Detailed Implementation

[0035] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0036] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] like Figures 1 to 6As shown, the planar rotary screen assembly support mechanism of this utility model includes a screen boat 1, a main suspension base 2, and suspension ropes 3. The feed end of the screen boat 1 is higher than the discharge end. The top of the feed end of the screen boat 1 is provided with a feed inlet 1a, and the bottom of the discharge end of the screen boat 1 is provided with a discharge outlet 1b. The main suspension base 2 is located below the screen boat 1, and the four corners of the main suspension base 2 are suspended from the upper frame by suspension ropes 3.

[0039] The bottom center of the feed end of the screening vessel 1 is supported on the top of the eccentric rotating mechanism 6. The lower end of the eccentric rotating mechanism 6 is supported on the crossbeam of the main suspension base 2. The lower drive end of the eccentric rotating mechanism 6 is equipped with a main pulley 6a, which is connected to the motor pulley at the lower end of the drive motor 4 via a belt 5. After the drive motor 4 starts, the motor pulley drives the main pulley 6a to rotate via the belt 5. The main pulley 6a drives the feed end of the screening vessel 1 to rotate eccentrically through the eccentric rotating mechanism 6.

[0040] Screen boat 1 has screen boat sliders 1c fixed to the bottom of its two corners at the discharge end. The lower end face of the screen boat sliders 1c is supported on a flat bearing 7, which bears the weight of the tail end of the screen boat 1. The flat bearing 7 includes a bearing seat 7a, supporting steel balls 7b, a bearing seal ring 7c, and a bearing base 7d. The upper end face of the bearing seat 7a has an annular ball groove, in which multiple supporting steel balls 7b are evenly distributed. The lower end face of the screen boat sliders 1c is supported on the top of each supporting steel ball 7b. The discharge end of the screen boat 1 moves back and forth on the supporting steel balls 7b supported by the screen boat sliders 1c. The supporting steel balls 7b roll and slide in the ball grooves of the bearing seat 7a to reduce frictional resistance.

[0041] The upper end face of the bearing seat 7a is fitted with a bearing seal ring 7c. The top of the bearing seal ring 7c abuts against the lower end face of the screen boat slider 1c, so that the lubricating oil in the ball groove cannot overflow and the site is kept clean.

[0042] The outer spherical surface of the lower part of the upper bearing seat 7a is supported in the inner spherical surface of the bearing base 7d. The spherical fit provides self-aligning and slight rotation, ensuring full contact between the screen boat slider 1c and the supporting steel ball 7b, thus ensuring uniform force distribution. The bottom of the bearing base 7d is fixed to the bottom support by bolts, and the bottom support is fixedly connected to the main suspension base 2.

[0043] A conical oil groove 7a1 is provided at the center of the upper end face of the bearing upper seat 7a. The lower end of the conical oil groove 7a1 is connected to the oil cavity of the bottom space of the bearing upper seat 7a, i.e. the bearing base 7d, through a central small hole.

[0044] The lowest point of the lower circumferential wall of the bearing base 7d is provided with an oil outlet hole that runs radially through it. The inner port of the oil outlet hole is connected to the oil cavity of the bearing base 7d, and the outer port of the oil outlet hole is screwed with an oil outlet connector 7f.

[0045] An oil inlet hole is provided at the lowest point of the upper circumferential wall of the bearing upper seat 7a. The inner port of the oil inlet hole communicates with the ball groove and the conical oil groove 7a1 of the bearing upper seat 7a. An oil inlet connector 7e is screwed to the outer port of the oil inlet hole. The oil inlet connector 7e is connected to the oil outlet of the automatic oil filling and return system 10 through an oil inlet pipe. The oil outlet connector 7f is connected to the oil inlet of the automatic oil filling and return system 10 through a return pipe. The lubricating oil delivered by the automatic oil filling and return system 10 enters the ball groove of the bearing upper seat 7a through the oil inlet pipe and the oil inlet connector 7e to lubricate each supporting steel ball 7b. Then it enters the conical oil groove 7a1 for collection and enters the oil cavity of the bearing base 7d through the central small hole, while lubricating the spherical surface of the bearing base 7d. Then the lubricating oil returns to the automatic oil filling and return system 10 through the oil outlet connector 7f and the oil outlet pipe, forming a closed loop circulation. This ensures that the planar support mechanism is always protected by a lubricating oil film, extending the service life of the components, while preventing overflow of the lubricating surface and keeping the site clean.

[0046] The transverse frame at the rear of the screening vessel 1 is connected to the crossbeam of the main suspension base 2 via multiple elastic plates 8. Each elastic plate 8 is symmetrically distributed along the length of the crossbeam of the main suspension base 2 and exhibits an S-shaped elastic bend along the length of the main suspension base 2. The upper end of each elastic plate 8 is fixed to the outside of the transverse frame at the rear of the screening vessel 1 via elastic plate clamping blocks 9, and the lower end of each elastic plate 8 is fixed to the inside of the crossbeam of the main suspension base 2 via elastic plate clamping blocks 9, causing the stern of the screening vessel 1 to reciprocate along the axis of the main suspension base 2. The circular motion at the feeding end gradually transitions to the linear motion at the discharging end, making the screening action of the screening vessel 1 similar to manual screening, facilitating screening and unloading, improving screening efficiency, and increasing output by more than 20% for the same area.

[0047] Each of the eight elastic plates bears only the linear impact force in the front-to-back direction and a small amount of torsional force, but does not bear the weight of the material contained in the screen vessel, thus extending its service life and improving operational stability.

[0048] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A planar rotary screen assembly support mechanism, characterized in that, include: Screening boat (1), with its feed end higher than its discharge end; The main base (2) is located below the screening boat (1) and is suspended from the upper frame by ropes (3) at its four corners. The eccentric rotating mechanism (6) is supported at the lower end by the crossbeam of the main suspension base (2) and at the upper end by the feed end of the screen boat (1). Its driving end is equipped with a main pulley (6a), which is connected to the drive motor (4) through a belt (5). The slide block (1c) of the screen boat is fixed below the two corners of the discharge end of the screen boat (1); The planar bearing (7) includes a bearing seat (7a), supporting steel balls (7b), a bearing seal ring (7c), and a bearing base (7d). Supporting steel balls (7b) are evenly distributed in the ball groove on the upper end face of the bearing seat (7a), and each supporting steel ball (7b) is supported on the lower end face of the screen boat slider (1c). The outer spherical surface of the bearing seat (7a) mates with the inner spherical surface of the bearing base (7d), and the bearing seal ring (7c) is embedded in the outer circumference of the bearing seat (7a) and abuts against the lower end face of the screen boat slider (1c). The upper end of the elastic plate (8) is fixed to the horizontal frame of the discharge end of the screen boat (1) by the elastic plate pressure block (9), and the lower end is fixed to the horizontal beam of the discharge end of the hanging main base (2) by the elastic plate pressure block (9).

2. The planar rotary screen assembly support mechanism according to claim 1, characterized in that: The upper bearing seat (7a) is provided with a conical oil groove (7a1) at its center, and the lower end of the conical oil groove (7a1) is connected to the oil cavity of the bearing base (7d) through a central small hole.

3. The planar rotary screen combined support mechanism according to claim 2, characterized in that: The lowest point of the lower circumferential wall of the bearing base (7d) is provided with an oil outlet hole that runs radially through it. The inner port of the oil outlet hole is connected to the oil cavity of the bearing base (7d), and the outer port of the oil outlet hole is provided with an oil outlet connector (7f). The lowest point of the upper circumferential wall of the bearing upper seat (7a) is provided with an oil inlet hole. The inner port of the oil inlet hole is connected to the ball groove and the conical oil groove (7a1) of the bearing upper seat (7a), and the outer port of the oil inlet hole is provided with an oil inlet connector (7e). The oil inlet connector (7e) is connected to the oil outlet of the automatic oil filling and return system (10), and the oil outlet connector (7f) is connected to the oil inlet of the automatic oil filling and return system (10).

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